Trolley-wheel.



No. 632,849. Patented Sept. l2, I899.

E. m. PUTNAM & w. SELLERS.

TBOLLEY WHEEL.

(Application filed. Mar. 25; 1899.)

(No Model.)

a WWW the same.

NrrED STATES PATENT QFFICE.

ED M. PUTNAM AND WILLIAM SELLERS, OF HAVERHILL, MASSACHUSETTS.

TROLLEY WH E EL.

SPECIFICATION forming part of Letters Patent No. 632,849, datedSeptember 12, 1899.

Application filed March 25, 1899.

To all whom it may concern:

Be it known that We, ED M. PUTNAM and WILLIAM SELLERS, citizens of theUnited States, and residents of Haverhill, in the county of Essex andState of Massachusetts, have invented certain new and usefulImprovements in Trolley-WVheels, of which the following is aspecification.

Trolley-wheels for making contact between an overhead wire and anelectric car are usually mounted upon a straight bolt carried by thefork, and the friction of the hub of the wheel upon the sides of thefork causes the wheel to soon work loose. In order to prevent thefriction coming upon the sides of the fork, washers have beenintroduced, but with very little satisfaction.

The object of our invention is to overcome this difficulty and to soconstruct and mount a wheel in the fork that it will run steady, butshould any wear take place can be readily and easily adjusted, and whichwill not be required to be lubricated.

The invention consists of a trolley-wheel having a central holecountersunk at each end and formed with a series of dovetailed recesses,into which graphite or other suitable lubricating material is inserted,also an annular recess in the center of the wheel, in which powdered orother suitable lubricating material is placed, and also in an axleconsisting of a screw-threaded rod that passes through the hole in thewheel and upon which is secured bearings cone-shaped at their inner endsto fit bevel at the sides of the wheel, and also in means for retainingsaid hearings in place.

Referring to the accompanying drawings, Figure 1 represents a side viewof a trolleywheel embodying our invention. Fig. 2 is a sectional View ofsame, taken on line so a; of Fig. 1. Fig. 3 is a longitudinal section ofthe axle for said wheel. Fig. 4: is an end view of Fig. 5 is a sideview, and Fig. 6is a section of the wheel and the axle.

A represents a trolley-wheel the general formation of which is the sameas that of the ordinary wheel; but the central hole a is at each sidecountersunk, as shown, and it is also formed with a number of dovetailedrecesses a,into each of which is placed graphite B, that is securelyheld in place by the dove- Serial No. 710,485. (No model.)

tailed form of said recesses. The wheel is also formed in its centralportion with an annular recess E, in which lubricating material isplaced, said material being introduced through an opening 6, and whenfilled said opening isclosed by a plug 6. This wheel is mounted upon anaxle consisting of ascrewthreaded rod 0, having near each end a smallhole 0, and upon each end of the rod is fitted a bearing D, cone-shapedat its inner end and Should the Wheel at any time work loose,

it can be readily and easily tightened up by removing one or both thepins E and turning the bearings D until they fit snugly into the wheel,and the graphite lubricating same will cause the wheel to run veryeasily.

Although we have shown a pin E passing through a hole in thescrew-threaded rod and between teeth on the outer end of the bearing, itis obvious that any other mechanical equivalent might be employed toprevent the bearing from turning upon said rod.

That we claim is 1. The combination with a trolley-wheel having acentral hole countersunk at each end and a series of dovetailed recessestherein and containing a suitable lubricating material, of an axle forsaid wheel consisting of a screw-threaded rod, and cone-shaped bearingsthreaded to fit the ends of said rod, whereby the two bearings may beadjustably set relatively to the dovetailed recesses in the wheel, andmeans for locking the bearings in their positions relatively to thethreaded rod, a space being formed between the central portion of thethreaded rod and the central portion of the hole in the wheel.

2. The combination with a trolley-wheel having a central holecountersunk at each end and a series of dovetailed recesses therein andcontaining a suitable lubricating material, and a central inner recessin said Wheel threaded rod and the central portion of the forcontaininglubricating material, of an axle hole in the Wheel. 1 t forsaid wheel consisting of a screw-threaded In testimony whereof we haveaffixed our rod, and cone-shaped bearings threaded to fit signatures inpresence of two witnesses.

5 the ends of said rod, whereby the two bearings vmay be adjustably setrelatively to the dovetailed recesses in the Wheel, and means forlocking the hearings in their positions Witnesses: relatively to thethreaded rod, a space being CHAS. STEERE,

[0 formed between the central portion of the EDWIN PLANTA.

